import java.util.Scanner;

public class Homework2 {

	public static void main(String[] args) {
		String[] strArr = new String[10];

		strArr[0] = "java";
		strArr[1] = "html";

		strArr[2] = "sql";
		strArr[3] = "android";

		strArr[4] = "javascript";
		strArr[5] = "ruby";

		strArr[6] = "c";

		strArr[7] = "c++";

		strArr[8] = ".net";

		strArr[9] = "ios";

		Scanner sc = new Scanner(System.in);

		System.out.print("请输入需要查找的计算机编程语言:");

		String inputStr = sc.next();

		boolean flag = false;

		for (String string : strArr) {

			if (string.equals(inputStr)) {

				flag = true;

				break;

			}

		}

		if (flag) {

			System.out.println("YES");

		} else {

			System.out.println("NO");

		}

	}

}
